615671165617 has 2 divisors, whose sum is σ = 615671165618. Its totient is φ = 615671165616.

The previous prime is 615671165591. The next prime is 615671165633. The reversal of 615671165617 is 716561176516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 594064811536 + 21606354081 = 770756^2 + 146991^2 .

It is a cyclic number.

It is not a de Polignac number, because 615671165617 - 2¹⁹ = 615670641329 is a prime.

It is not a weakly prime, because it can be changed into another prime (615671165687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307835582808 + 307835582809.

It is an arithmetic number, because the mean of its divisors is an integer number (307835582809).

Almost surely, 2^615671165617 is an apocalyptic number.

It is an amenable number.

615671165617 is a deficient number, since it is larger than the sum of its proper divisors (1).

615671165617 is an equidigital number, since it uses as much as digits as its factorization.

615671165617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 52.

The spelling of 615671165617 in words is "six hundred fifteen billion, six hundred seventy-one million, one hundred sixty-five thousand, six hundred seventeen".